Dynamic Study of the Thermoelastic Transformation of Cu-Zn-Al single crystals by X-Ray diffraction

Optically transparent single crystals of potassium acid phthalate (KAP, 0.5 g) 0.05 g and 0.1 g (1 and 2 mol %) trytophan were grown in aqueous solution by slow evaporation technique at room temperature. Single crystal X- ray diffraction analysis confirmed the changes in the lattice parameters of the doped crystals. The presence of functional groups in the crystal lattice has been determined qualitatively by FTIR analysis. Optical absorption studies revealed that the doped crystals possess very low absorption in the entire visible region. The dielectric constant has been studied as a function of frequency for the doped crystals. The thermal stability was evaluated by TG-DSC analysis.

Some Novel Cobalt Diphenylphosphine Complexes: Synthesis, Characterization, and Behavior in the Polymerization of 1,3-Butadiene

Molecules ◽

10.3390/molecules26134067 ◽

2021 ◽

Vol 26 (13) ◽

pp. 4067

Author(s):

Giovanni Ricci ◽

Giuseppe Leone ◽

Giorgia Zanchin ◽

Benedetta Palucci ◽

Alessandra Forni ◽

...

Keyword(s):

Crystal Structure ◽

Single Crystals ◽

The Novel ◽

X Ray Diffraction ◽

X Ray ◽

And Behavior

Some novel cobalt diphenylphosphine complexes were synthesized by reacting cobalt(II) chloride with (2-methoxyethyl)diphenylphosphine, (2-methoxyphenyl)diphenylphosphine, and 2-(1,1-dimethylpropyl)-6-(diphenylphosphino)pyridine. Single crystals suitable for X-ray diffraction studies were obtained for the first two complexes, and their crystal structure was determined. The novel compounds were then used in association with methylaluminoxane (MAO) for the polymerization of 1,3-butadiene, and their behavior was compared with that exhibited in the polymerization of the same monomer by the systems CoCl2(PnPrPh2)2/MAO and CoCl2(PPh3)2/MAO. Some significant differences were observed depending on the MAO/Co ratio used, and a plausible interpretation for such a different behavior is proposed.

Growth of sillenite Bi12FeO20 single crystals: structural, thermal, optical, photocatalytic features and first principle calculations

Scientific Reports ◽

10.1038/s41598-020-78598-3 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Durga Sankar Vavilapalli ◽

Ambrose A. Melvin ◽

F. Bellarmine ◽

Ramanjaneyulu Mannam ◽

Srihari Velaga ◽

...

Keyword(s):

Single Crystal ◽

Single Crystals ◽

Photoelectron Spectroscopy ◽

Diffraction Method ◽

Lattice Parameter ◽

First Principle ◽

X Ray Diffraction ◽

X Ray ◽

First Principle Calculations ◽

Photodegradation Efficiency

AbstractIdeal sillenite type Bi12FeO20 (BFO) micron sized single crystals have been successfully grown via inexpensive hydrothermal method. The refined single crystal X-ray diffraction data reveals cubic Bi12FeO20 structure with single crystal parameters. Occurrence of rare Fe4+ state is identified via X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS). The lattice parameter (a) and corresponding molar volume (Vm) of Bi12FeO20 have been measured in the temperature range of 30–700 °C by the X-ray diffraction method. The thermal expansion coefficient (α) 3.93 × 10–5 K−1 was calculated from the measured values of the parameters. Electronic structure and density of states are investigated by first principle calculations. Photoelectrochemical measurements on single crystals with bandgap of 2 eV reveal significant photo response. The photoactivity of as grown crystals were further investigated by degrading organic effluents such as Methylene blue (MB) and Congo red (CR) under natural sunlight. BFO showed photodegradation efficiency about 74.23% and 32.10% for degrading MB and CR respectively. Interesting morphology and microstructure of pointed spearhead like BFO crystals provide a new insight in designing and synthesizing multifunctional single crystals.

Modeling of magneto-conductivity of bismuth selenide: a topological insulator

SN Applied Sciences ◽

10.1007/s42452-021-04397-8 ◽

2021 ◽

Vol 3 (4) ◽

Author(s):

Yogesh Kumar ◽

Rabia Sultana ◽

Prince Sharma ◽

V. P. S. Awana

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Single Crystal ◽

Single Crystals ◽

X Ray Diffraction ◽

Field Range ◽

X Ray ◽

Bulk Carriers ◽

Different Temperatures

AbstractWe report the magneto-conductivity analysis of Bi2Se3 single crystal at different temperatures in a magnetic field range of ± 14 T. The single crystals are grown by the self-flux method and characterized through X-ray diffraction, Scanning Electron Microscopy, and Raman Spectroscopy. The single crystals show magnetoresistance (MR%) of around 380% at a magnetic field of 14 T and a temperature of 5 K. The Hikami–Larkin–Nagaoka (HLN) equation has been used to fit the magneto-conductivity (MC) data. However, the HLN fitted curve deviates at higher magnetic fields above 1 T, suggesting that the role of surface-driven conductivity suppresses with an increasing magnetic field. This article proposes a speculative model comprising of surface-driven HLN and added quantum diffusive and bulk carriers-driven classical terms. The model successfully explains the MC of the Bi2Se3 single crystal at various temperatures (5–200 K) and applied magnetic fields (up to 14 T).

X-ray diffraction study of phase transitions in Na3Sc2(PO4)3 and Ag3Sc2(PO4)3 single crystals in temperature range from 160 to 500 K

Crystallography Reports ◽

10.1134/1.1857256 ◽

2005 ◽

Vol 50 (1) ◽

pp. 115-119 ◽

Cited By ~ 5

Author(s):

G. V. Shilov ◽

L. O. Atovmyan ◽

V. I. Kovalenko

Keyword(s):

Phase Transitions ◽

Diffraction Study ◽

Single Crystals ◽

X Ray Diffraction ◽

X Ray ◽

Temperature Range

Characterization of Natural and Synthesized FeTiO3 Crystals With RBS/PIXE/XRD

International Journal of PIXE ◽

10.1142/s0129083597000308 ◽

1997 ◽

Vol 07 (03n04) ◽

pp. 265-275

Author(s):

R. Q. Zhang ◽

S. Yamamoto ◽

Z. N. Dai ◽

K. Narumi ◽

A. Miyashita ◽

...

Keyword(s):

Single Crystals ◽

Ion Beam ◽

Pressure Control ◽

Floating Zone ◽

X Ray Diffraction ◽

X Ray ◽

Beam Analysis ◽

Ppm Level

Natural FeTiO 3 (illuminate) and synthesized FeTiO 3, single crystals were characterized by Rutherford backscattering spectroscopy combined with channeling technique and particle-induced x-ray emission (RBS-C and PIXE). The results obtained by the ion beam analysis were supplemented by the x-ray diffraction analysis to identify the crystallographic phase. Oriented single crystals of synthesized FeTiO 3 were grown under the pressure control of CO 2 and H 2 mixture gas using a single-crystal floating zone technique. The crystal quality of synthesized FeTiO 3 single crystals could be improved by the thermal treatment but the exact pressure control is needed to avoid the precipitation of Fe 2 O 3 even during the annealing procedure. Natural FeTiO 3 contains several kinds of impurities such as Mn , Mg , Na and Si . The synthesized samples contain Al , Si and Na which are around 100 ppm level as impurities. The PBS-C results of the natural sample imply that Mn impurities occupy the Fe sublattice in FeTiO 3 or in mixed phase between ilmenite and hematite.

X-Ray Diffraction Study of the Decomposition Process Occurring in Single Crystals of the K2NiF4-Type Aluminate LaCaAlO4

Journal of Solid State Chemistry ◽

10.1006/jssc.1997.7557 ◽

1997 ◽

Vol 134 (1) ◽

pp. 132-137 ◽

Cited By ~ 9

Author(s):

Yr. Smirnov ◽

I. Zvereva ◽

J. Choisnet

Keyword(s):

Diffraction Study ◽

Single Crystals ◽

Decomposition Process ◽

X Ray Diffraction ◽

X Ray

Purification and growth of single crystals of cadmium iodide by zone refining and study of their polytypism by x-ray diffraction

Journal of Crystal Growth ◽

10.1016/0022-0248(82)90073-2 ◽

1982 ◽

Vol 57 (3) ◽

pp. 558-562 ◽

Cited By ~ 21

Author(s):

S.K. Chaudhary ◽

G.C. Trigunayat

Keyword(s):

Single Crystals ◽

Cadmium Iodide ◽

Zone Refining ◽

X Ray Diffraction ◽

X Ray

Controlled Synthesis of Large Single Crystals of Metal‐Organic Framework CPO‐27‐Ni Prepared by a Modulation Approach: In situ Single Crystal X‐ray Diffraction Studies

Chemistry - A European Journal ◽

10.1002/chem.202100528 ◽

2021 ◽

Author(s):

Simon Maximilian Vornholt ◽

Caroline G. Elliott ◽

Cameron M. Rice ◽

Samantha E. Russell ◽

Peter J. Kerr ◽

...

Keyword(s):

Single Crystal ◽

Single Crystals ◽

Metal Organic Framework ◽

Controlled Synthesis ◽

X Ray Diffraction ◽

X Ray ◽

Metal Organic ◽

Organic Framework

Structural-phase transition in (Cu2Te)2−x(ZnTe)x at high temperature

International Journal of Modern Physics B ◽

10.1142/s0217979221501137 ◽

2021 ◽

pp. 2150113

Author(s):

H. B. Gasimov ◽

R. M. Rzayev

Keyword(s):

Phase Transition ◽

Phase Transitions ◽

High Temperature ◽

Single Crystals ◽

Structural Phase ◽

X Ray Diffraction ◽

X Ray ◽

Temperature Range ◽

Xrd Study ◽

Xrd Method

Cu2Te single crystal was grown by the Bridgman method. X-ray diffraction (XRD) study of Cu2Te single crystals in the temperature range of 293–893 K was performed and possible phase transitions in the mentioned range of temperature have been investigated. (Cu2Te)[Formula: see text](ZnTe)[Formula: see text] single crystals also were grown with [Formula: see text], 0.05, 0.10 concentrations and structural properties of the obtained single crystals were investigated by the XRD method in the temperature range 293–893 K. Lattice parameters and possible phase transitions in the mention temperature range were determined for (Cu2Te)[Formula: see text](ZnTe)[Formula: see text] single crystals for [Formula: see text], 0.05, 0.10 concentrations.